Connects Claude to DefaultVerifier's SAR (Settlement Attestation Receipt) infrastructure for cryptographic verification of agent task completion. Exposes endpoints to submit task specs and outputs, receive signed receipts with verdict and confidence scores, retrieve receipts by ID or wallet address, and access public verification keys. Useful when you need provable attestation that an AI agent actually fulfilled its specification, especially in multi-party scenarios where settlement or payment depends on verified execution. Receipts are Ed25519-signed, publicly retrievable, and include counterparty binding for bilateral agreements. Ships with verification examples in Node and Python for local signature checking against the published JWKS.
claude mcp add --transport http com.defaultverifier-settlement-witness https://defaultverifier.com/mcp